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Consolidated Statements of Changes In Shareholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Paid-in Capital | Loss on Pension Benefit Obligation | Currency Translation Adjustments | Foreign Currency Hedge Adjustment | Commodity Hedge Adjustment | Interest Rate Hedge Adjustment | Accumulated Earnings
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2013 | $ 232,094 | $ 232,067 | $ (9,582) | $ (1,058) | $ (4,064) |  |  | $ (81) | $ 14,812
Beginning Balance (in shares) at Dec. 31, 2013 |  | 34,929,000 |  |  |  |  |  |  |
Exercise of Common Stock options for cash | $ 7,176 | $ 9,595 | (2,419) |  |  |  |  |  |
Exercise of Common Stock options for cash (in shares) | 731,142 | 731,000 |  |  |  |  |  |  |
Tax benefit from Exercises of Common Stock options | $ 1,831 |  | 1,831 |  |  |  |  |  |
Common Stock issued to Board of Directors and employees | 2,706 | $ 2,706 |  |  |  |  |  |  |
Common Stock issued to Board of Directors and employees (in shares) |  | 105,000 |  |  |  |  |  |  |
Stock option compensation | 1,946 |  | 1,946 |  |  |  |  |  |
Cancelation of restricted stock | (1,113) | $ (1,113) |  |  |  |  |  |  |
Cancelation of restricted stock (in shares) |  | (68,000) |  |  |  |  |  |  |
Net gain (loss) on pension benefit obligation, net | (1,615) |  |  | (1,615) |  |  |  |  |
Currency translation, net | (18,996) |  |  |  | (18,996) |  |  |  |
Foreign currency hedge, net | (10) |  |  |  |  | $ (10) |  |  |
Interest rate hedge, net | 81 |  |  |  |  |  |  | $ 81 |
Net income | 70,119 |  |  |  |  |  |  |  | 70,119
Ending Balance at Dec. 31, 2014 | 294,219 | $ 243,255 | (8,224) | (2,673) | (23,060) | (10) |  |  | 84,931
Ending Balance (in shares) at Dec. 31, 2014 |  | 35,697,000 |  |  |  |  |  |  |
Exercise of Common Stock options for cash | $ 9,273 | $ 12,146 | (2,873) |  |  |  |  |  |
Exercise of Common Stock options for cash (in shares) | 571,723 | 571,000 |  |  |  |  |  |  |
Tax benefit from Exercises of Common Stock options | $ 6,681 |  | 6,681 |  |  |  |  |  |
Common Stock issued to Board of Directors and employees | 3,734 | $ 3,734 |  |  |  |  |  |  |
Common Stock issued to Board of Directors and employees (in shares) |  | 108,000 |  |  |  |  |  |  |
Stock option compensation | 3,025 |  | 3,025 |  |  |  |  |  |
Cancelation of restricted stock | (2,216) | $ (2,216) |  |  |  |  |  |  |
Cancelation of restricted stock (in shares) |  | (54,000) |  |  |  |  |  |  |
Net gain (loss) on pension benefit obligation, net | 613 |  |  | 613 |  |  |  |  |
Currency translation, net | (26,212) |  | 109 |  | (26,321) |  |  |  |
Foreign currency hedge, net | 10 |  |  |  |  | 10 |  |  |
Commodity hedge, net | (229) |  |  |  |  |  | $ (229) |  |
Net income | 95,393 |  |  |  |  |  |  |  | 95,393
Ending Balance at Dec. 31, 2015 | $ 384,291 | $ 256,919 | (1,282) | (2,060) | (49,381) |  | (229) |  | 180,324
Ending Balance (in shares) at Dec. 31, 2015 | 36,321,775 | 36,322,000 |  |  |  |  |  |  |
Exercise of Common Stock options for cash | $ 1,438 | $ 1,939 | (501) |  |  |  |  |  |
Exercise of Common Stock options for cash (in shares) | 112,875 | 113,000 |  |  |  |  |  |  |
Tax benefit from Exercises of Common Stock options | $ 7,509 |  | 7,509 |  |  |  |  |  |
Common Stock issued to Board of Directors and employees | 4,589 | $ 4,589 |  |  |  |  |  |  |
Common Stock issued to Board of Directors and employees (in shares) |  | 137,000 |  |  |  |  |  |  |
Stock option compensation | 4,597 |  | 4,597 |  |  |  |  |  |
Cancelation of restricted stock | (1,196) | $ (1,196) |  |  |  |  |  |  |
Cancelation of restricted stock (in shares) |  | (38,000) |  |  |  |  |  |  |
Net gain (loss) on pension benefit obligation, net | (490) |  |  | (490) |  |  |  |  |
Currency translation, net | (16,381) |  |  |  | (16,381) |  |  |  |
Foreign currency hedge, net | (1,020) |  |  |  |  | (1,020) |  |  |
Commodity hedge, net | 470 |  |  |  |  |  | 470 |  |
Net income | 76,598 |  |  |  |  |  |  |  | 76,598
Ending Balance at Dec. 31, 2016 | $ 460,405 | $ 262,251 | $ 10,323 | $ (2,550) | $ (65,762) | $ (1,020) | $ 241 |  | $ 256,922
Ending Balance (in shares) at Dec. 31, 2016 | 36,534,464 | 36,534,000 |  |  |  |  |  |  |

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